To Norwegians, as to Scandinavians in general, the thought of becoming the object of a major terrorist attack was remote in the extreme. But when such an attack actually happened, it was on a scale that shook the world to its foundations. What did really happen?

A devastating bomb explosion in the heart of Norway's capital city, Oslo. A deranged man's ruthless hunt for defenceless children and young people on the isolated lake island of Utøya. Seventy-seven people killed and close on one hundred injured. Government buildings left in ruins, with damage amounting to billions of kroner. Hundreds of people doomed to suffer from life-long traumas. A nation - and a world - left reeling.

Based on unpublished police documents and interviews with those whose lives were changed forever as a result of the bombing and shootings, we tell the accurate story of one of the most outrageous terrorist attacks ever - minute by minute.

In the space of only two hours, Norway had become a different country: hundreds of people had lost someone they loved; and five million had lost their illusions.